JPH0734331B2 - Magnet wire - Google Patents
Magnet wireInfo
- Publication number
- JPH0734331B2 JPH0734331B2 JP24301887A JP24301887A JPH0734331B2 JP H0734331 B2 JPH0734331 B2 JP H0734331B2 JP 24301887 A JP24301887 A JP 24301887A JP 24301887 A JP24301887 A JP 24301887A JP H0734331 B2 JPH0734331 B2 JP H0734331B2
- Authority
- JP
- Japan
- Prior art keywords
- wire
- magnet wire
- present
- insulating layer
- conductor core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000004020 conductor Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N Butyraldehyde Chemical compound CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000011527 polyurethane coating Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
Landscapes
- Insulated Conductors (AREA)
- Communication Cables (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は磁気ヘッド、オーディオピックアップ等の微小
振巾信号を検出する素子、特にマグネットワイヤに関す
るものである。The present invention relates to an element for detecting a minute amplitude signal, such as a magnetic head and an audio pickup, and more particularly to a magnet wire.
磁気センサ、圧力センサなど各種のセンサが広く実用化
されているが、それらのセンサにはコイルやリード線用
にマグネットワイヤと称せられる微細径の銅線が用いら
れている。これは導体として直径20〜50μｍの銅に１〜
数ミクロンの厚さのポリウレタンやポリエステルなどの
被覆をかぶせたものである。このような線材は線径が細
くきわめてフレキシブルであるための装置の小型化、繰
り返し曲げの耐久性を要求されているところに好んで使
用されている。Various sensors such as a magnetic sensor and a pressure sensor have been widely put into practical use, but for these sensors, a fine diameter copper wire called a magnet wire is used for a coil and a lead wire. This is 1 to copper with a diameter of 20 to 50 μm as a conductor
It is covered with a coating of polyurethane or polyester with a thickness of several microns. Since such a wire rod has a small wire diameter and is extremely flexible, it is preferably used in a device where downsizing of the device and durability against repeated bending are required.
ところがこれらの線を用いる場合の信号電圧は通常1mV
またはそれ以下の250μＶぐらいであり、外来雑音に対
しきわめて弱い。このためこれらの線材をシールドする
ためにシールド線でさらに被覆したり、金属チューブ状
の中に通したりすることもあるが、これらの方法では全
体の外径が大きくなったり、フレキシビリティが失われ
たりしてマグネットワイヤ本来の利点が失われてしまう
という大きな欠点があった。However, the signal voltage when using these lines is usually 1 mV
It is about 250 μV, which is lower than that, and extremely weak against external noise. Therefore, in order to shield these wire rods, they may be further covered with a shielded wire or passed through a metal tube, but with these methods, the overall outer diameter becomes large and flexibility is lost. However, there is a big drawback that the original advantage of the magnet wire is lost.
従って本発明の目的は外径寸法を大きくせず有効な金属
被覆を有し、かつフレキシビリティのある微細線状のマ
グネットワイヤを提供することにある。Therefore, an object of the present invention is to provide a fine linear magnet wire which has an effective metal coating without increasing the outer diameter and has flexibility.
以上の課題を解決するため、本発明のマグネットワイヤ
は、導体芯線と、この導体芯線を被覆する絶縁層と、こ
の絶縁層を微小膜厚で被覆し金属微細粉末を混入した導
電性樹脂層とを含む。In order to solve the above problems, the magnet wire of the present invention includes a conductor core wire, an insulating layer covering the conductor core wire, and a conductive resin layer in which the insulating layer is covered with a fine film thickness and mixed with metal fine powder. including.
次に本発明について図面を参照して説明する。 Next, the present invention will be described with reference to the drawings.
第１図は本発明の一実施例の断面を示すものである。FIG. 1 shows a cross section of an embodiment of the present invention.
図中、１は導体芯線、２はその周囲を覆うポリウレタン
被覆による絶縁層、３は銀粉入りブチラール樹脂被覆に
よるシールド層、４は銀粉末である。図の例において、
導体芯線１は直径40μｍの合金銀製、絶縁層２は膜厚４
μｍ、シールド層３は膜厚５μｍであり、シールド層３
は商品名ドータイトで知られている導電性接着剤と同様
な構成からなっていてその樹脂成分としてブチラールが
用いられるものである。この導電性ブチラール層がシー
ルドとして働いている。ブチラール樹脂の特色はイソプ
ロピルアルコールのような有機溶剤にて溶けることであ
り、このため端末処理部においてはシールド層と芯線導
体層とのショートを避けることができる。In the figure, 1 is a conductor core wire, 2 is an insulating layer made of polyurethane coating covering the periphery thereof, 3 is a shield layer made of butyral resin coating containing silver powder, and 4 is silver powder. In the example shown,
Conductor core wire 1 is made of alloy silver with a diameter of 40 μm, and insulating layer 2 has a film thickness of 4
μm, the shield layer 3 has a film thickness of 5 μm, and the shield layer 3
Has the same structure as a conductive adhesive known under the trade name DOTITE, and uses butyral as its resin component. This conductive butyral layer acts as a shield. The characteristic of butyral resin is that it is soluble in an organic solvent such as isopropyl alcohol, so that a short circuit between the shield layer and the core conductor layer can be avoided in the terminal treatment section.
第２図は本発明のシールド付きマグネットワイヤを使用
した磁気ディスク用磁気ヘッドアセンブリの一部を示し
たものである。図に示したマグネットワイヤ11は従来例
では全くシールドすることができなかった部分である。FIG. 2 shows a part of a magnetic head assembly for a magnetic disk using the shielded magnet wire of the present invention. The magnet wire 11 shown in the figure is a portion that cannot be shielded at all in the conventional example.
また端末のハンダ付部12においてはグランド部ランド13
と被覆シールド部14は導電性接着剤によって電気的に接
続されている。In the soldered part 12 of the terminal, the ground part land 13
The cover shield portion 14 and the shield portion 14 are electrically connected by a conductive adhesive.
本発明は上述の磁気ヘッドアセンブリに限らず、光ヘッ
ドアクチュエータ、レコードプレーヤピックアップ等に
ついても同様に適用できる。The present invention is not limited to the magnetic head assembly described above, but can be similarly applied to optical head actuators, record player pickups, and the like.
以上説明したように本発明のマグネットワイヤによれば
導体芯線を被覆する絶縁体のさらにうえに金属粉を混入
した導電性樹脂層をきわめて薄くコーティングすること
によりフレキシビリティを失わず、かつ優れたシールド
効果を実現することができる。As described above, according to the magnet wire of the present invention, the conductive resin layer mixed with the metal powder is further thinly coated on the insulator covering the conductor core wire, so that flexibility is not lost and an excellent shield is obtained. The effect can be realized.
第１図は本発明の一実施例の断面図、第２図は本発明を
用いた磁気ヘッドアセンブリの一部を示す図である。 １…導体芯線、２…絶縁層、３…シールド層FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a view showing a part of a magnetic head assembly using the present invention. 1 ... Conductor core wire, 2 ... Insulating layer, 3 ... Shield layer
Claims (1)
導電性樹脂層とを含むことを特徴とするマグネットワイ
ヤ。1. A magnet wire, comprising: a conductor core wire; an insulating layer covering the conductor core wire; and a conductive resin layer coated with a minute film thickness of the insulating layer and mixed with metal fine powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24301887A JPH0734331B2 (en) | 1987-09-28 | 1987-09-28 | Magnet wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24301887A JPH0734331B2 (en) | 1987-09-28 | 1987-09-28 | Magnet wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6484514A JPS6484514A (en) | 1989-03-29 |
| JPH0734331B2 true JPH0734331B2 (en) | 1995-04-12 |
Family
ID=17097650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24301887A Expired - Fee Related JPH0734331B2 (en) | 1987-09-28 | 1987-09-28 | Magnet wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0734331B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2570071Y2 (en) * | 1990-11-30 | 1998-04-28 | 日立電線株式会社 | High frequency magnet wire |
| JP4733316B2 (en) * | 2001-08-24 | 2011-07-27 | ヤンマー株式会社 | Fertilizer |
-
1987
- 1987-09-28 JP JP24301887A patent/JPH0734331B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6484514A (en) | 1989-03-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |